Belt-pulley and similar device



1. T. SANDBERGk BELT PULLEY AND SIMILAR DEVICE.

APPLICATION FILED APR. 3, 1920.

Patented Julie 21, 1921.

Unirse stares Parent carica.

JAMES TORSTEN SNDBERG, 0F G-OTTENBORG, SWEDEN.

BELT-PULLEY AND SIMLAB DEVICE.

Specification of Letters Patent.

Patented June 21, 1921.

Application :'iiod April 3, 1920. Serial No. 370,926.

' which the following is a specification.

This invention refers to belt pulleys and similar devices, which consist of a body of cast iron or the like, undivided or subdivided in two or more parts and provided with a sheet iron rim, which is in suitable manner attached to the body.

The principal object of this invention is to provide improved means for attaching the sheet iron rim to the annular web portion of the body of the pulley.

@ther objects of the invention will be clearly understood bv the following specification, reference being made to the ac-v companying drawing, iilustrating some einbodiments of the invention.

in the drawing Figure l shows a side view of a beit pulley and Fig. 2 an axial section of the same. Figs. 3, 1-, 5 and 6 show in axial sections a portion of the rim, attached to the web portion according to Various embodiments of the invention. Fig. 7 shows a portion of the rirn viewed from the inner side and showing one arm of the pulley in section.

In the drawing the invention is illustrated as applied to a pulley subdivided in two parts for facilitating the application of the pulley in a shaft, but I do not limit myself to suoli a special form of this invention.

in the drawing l denotes the one half of the divided body of the pulley and 2 the arms, connected with the hub portion 3 and with the annuiar web portion 5. 6 denotes the sheet iron rim, according to the embodiment, shown in the drawing, divided in two halves, which are joined together by means of ang-le bent lugs 8 provided on the inner side at the ends of the rim 6. The halves of the pulley can as known be clamped to a shaft by means of screwbolts 13.

The web portion 5, of cast iron or similar material, is provided with plate iron brackets of various shapes l0, projecting from the web 5 in axial direction and cast into the web 5.

The projecting ends of the brackets l0 are attached to the rim 6 by means of rivets iet or bolts l5 or by electrical or autogenous soldering` or welding. In Fig. 6 washers 16, 17' are provided between the rim 6 and the brackets lO.

The brackets l0 may be bent to follow the inside shape of the rim 6, so that, if the rim be straight lined in axial direction as illustrated in Figs. 2, 4, 5 and 6, the brackets are formed with Vstraight lined projecting ends, or if the rim befconveX, as shown in Fig. 3 with curved ends sloping down the inside of the rim 6. The inner ends il of the brackets 10, which are cast into the body portion 5 may be angle bent in relation to the projecting portionsof the brackets, so that theyare safely secured in the body 5. Moreover it may be advantageous to cast the brackets in the web portion' 5 at a certain distance apart from the outer periphery of the said portion and to make a bend outward to the joint with the rim 6 such as clearly illustrated in the Figs. 2-5, thereby increasing the stiiiening effect upon the rim. Somewhat the same result is obtained by the device shown in Fig. 6 by means of the washers 16, 17.

I do not limit myself to the shapeY of the brackets l0 as described and illustrated in the drawing but I want to vary this detail without interfering with the scope of my invention. For instance the two brackets l0 Vprojecting on each side of the web portion can be substituted by a single piece forming the double end projecting bracket.

i/Vhat/l' claim is:

l. In ua belt pulley a cast iron web portion, a sheet iron rim encircling said web portion, brackets joining said rim to said web portion and cast in the web by means of angle bent ends.,

2. In a belt pulley a cast iron web portion, a sheet iron rim encircling said web portion, brackets joining said rim to said web portion and having angle bent ends cast in the web at some distance from the periphery of said web `portion and bent outwardly toward the inner-surface of the riin forming stidening rsupports for the rim.

3.1n a belt pulley a cast iron web portion, a sheet iron rim encircling said web portion, brackets joining said rim to said Web portion and having angle bent ends cast ends cast in the Web7 and means Securing n theweb, Washers arranged between the the outer ends of said brackets to the inner brackets and the inner surface of the rim. surface of seid rim. 10 4f. 1n ebelt pulley, a cest iron Web por n testimony whereof I have affixed my 5 tion, a sheet iron rim encircling Said Web Signa-ture portion, sheet metal brackets joining'saicl v rim tosad web portion and having inner JAMES TORSTEN SANDBERG. 

